岩土工程学报2023，Vol.45Issue(z2)：7-12,6.DOI:10.11779/CJGE2023S20007
地震动随机性对地表加速度峰值的影响及机理研究
Effects and mechanisms of ground vibration randomness on peak surface acceleration
摘要
Abstract
The randomness of artificial seismic vibration has important influences on the peak value of ground acceleration.Based on the results of soil layer shear wave velocity and soil body nonlinear statistics,three soil layer seismic response models are established.Taking the typical bedrock acceleration response spectrum of Heilongjiang region as the target one,400 random seismic acceleration intervals are synthesized manually by 400 different random numbers for each target spectrum.Through the experience of soil layer seismic response,10800 peak ground acceleration results are obtained from the three models.The distribution characteristics and differences of acceleration peaks under each target spectrum are analyzed statistically,and the reasons for this difference are explained preliminarily by comparing the Fourier spectrum with target response one.The results show that under the same profile and target response spectrum,there is a certain difference in the peak value of ground surface acceleration obtained by different random numbers,which shows a normal distribution.This difference is positively correlated with the response spectral value of the seismic targets corresponding to the Fourier spectrum peak periods of the surface earthquakes.关键词
随机数/人造地震动/加速度峰值/反应谱/傅里叶谱Key words
random number/artificial ground motion/peak acceleration/response spectrum/Fourier spectrum分类
土木建筑引用本文复制引用
齐文浩,陈方晓,李林芳,张苋凯..地震动随机性对地表加速度峰值的影响及机理研究[J].岩土工程学报,2023,45(z2):7-12,6.基金项目
中国地震局工程力学研究所基本科研业务费专项资助项目(2021C07) （2021C07）
黑龙江省科学基金项目(LH2021E121) （LH2021E121）
